In a canteen,
49 of the students wore cardigans. After 35 students who wore cardigans left the canteen, the percentage of students who wore cardigans decreased to 25%. How many students in the canteen did not wear cardigans?
| |
Wore cardigans |
Did not wear cardigans |
| Before |
4x3 =
12 u |
5x3 =
15 u |
| Change |
- 35 |
|
| After |
1x5 =
5 u |
3x5 =
15 u |
25% =
25100 =
14The number of students who did not wear cardigans remains unchanged. LCM of 5 and 3 is 15.
Number of students who wore cardigans and left
= 12 u - 5 u
= 7 u
7 u = 35
1 u = 35 ÷ 7 = 5
Number of students who did not wear cardigans
= 15 u
= 15 x 5
= 75
Answer(s): 75
